Scraper blade



June 17, 1930. I J. P. ERHART 1,765,218

4scRAPER BLADE f l Filed Dec. 26, 1928 Z'Sheets-Sheet l ATTORNEY J. P. ERHART scRAPER BLADE June 17, 1930.

Filed Dec. 2.6, 1928 2 Sheets-SheetI 2 gpp ATTORNEY Patented June 17, 1930 f UNITED STATES PATENT oFFicE JULIUS P. ERHAR'I', OF ANDERSON, CALIFORNIA, ASSIGNOR 0F ONE-HALF TO LEON P. "ilk MILLER AND RALPH M. MILLER, OF ANDERSON, CALIFORNIA y scRArnR is'LAnn Application med December ze, '1928. serial N6. 328,420.

This invention relates to improvements in scrapers or other cutting devices adapted for use upon road scrapers used .1n the maintenance of roads.

An object of the invention contemplates a scraper bit for the scraper blade.

Another object of the invention comprehends a corrugated face for the bit.

More specifically stated the corrugationsare right-angularly disposed whereby the eX- posed working portions of the bit will eliminate side draft and collect loose dirt between the corrugations to fill in holes and other depressions in the road.

The blade set at right angles to the road with the mold-'board of the scraper tilted forward leaving the right-angular points to the front making a scariier to do light work on corrugated roads under maintenance operation that no blade will do at the present time. This blade will do the same work on a two and a half ton grader that it takes a five and a half t0n grader. to do with the present type of blades in use.y Ripples or corrugations can be taken out ofroads with this blade without having to tear the solid road bed up and regrade and repack again.

With the above and other objects in view, the invention further consists of the following novel features and details of vconstrucv tion, to be hereinafter more fully described,

illustrated in the accompanying drawings and pointed out inthe appended claims.

In the drawings Figure 1 is a side elevation of a road scraper with the present invention applied and in use.

Figure 2 is a front elevation of the scraper bit per se.

Figure 3 is a bottom plan view of the bit illustrating the relative arrangement ofthe corrugated working face thereof.

Figure t is a fragmentary perspective view of the bit;

Figure 5 is a sectional view taken on line 5 5 of Figure 1.

Figure 6 is a longitudinal sectional view taken through the invention and illustrating by arrows the straight line draft whereby side draft will be overcome.

Referring to the drawings in detail, where` in like characters .of reference ldenote corresponding parts, the reference character 10 indicates generally the conventional form! of scraper apparatus having a scraper blade 11 exposing a concave'd y face toward the front. A scraper bit or blade, such as indicated at 12, and conforming in shape to lthat of the general contour of the scraper blade 11, is adapted to dispose the uppermost edge thereof within a pocket portion 13* located adjacent the lowermost edge of the scraper blade 11. Fastening elements 14 being passed through the overlapping portions of the blade and bit to prevent dis-` placement and removably secure the latter. The face of the bit 12 is formed by a succession of right angularly disposed portions 15 and 16 respectively in the manner shown in Figures 2 to Ginclusive.

v From the illustration in Figure 6 of the drawings, it is noted that according to the disposition of the arrows that the faces 16y l are exposed to the road surface of the bit will colle-ct between the faces 15 and 16 and carry same therebetween until a rut,

' hollow or other depression is encountered in the roadway, at which time the dirt will be deposited therein.

The improved type of bit will eliminate side draft as it wears away the road surface or at least the corduroy effect thereof. At the same time the faces 15y of the bit traveling in the direction of the arrows in Figure 6 of the drawings will be sharpened. When the bit is reversed upon the return of the The invention is susceptible of various changes in its form, proportions and minor `details of construction, and the right is herein reserved to make such Changes as properly fall Wit-hin the scope of the appended claims.

Having thus described the invention, what is elaimed is l. A scraper bit comprising an elongated blade of arcuate `cross section, corrugations formed upon the Working face of the bit, and

.said corrugations being right angularly disposed to obviete side draft of the bit While in use. v

2. A scraper bit comprising an elongated blade of arcuate shape inl cross section, corrugations formed in unbroken order upon the Working face and edge of the bit, and each of said veorrugations being relatively right angularly disposed to obviatey side draft of the bit While in use and to facilitate employment of same with equal effect WhenV shifted inversely.

In testimony whereof I ax my signature.

JULIUS P. ERHART. 

